Air-conditioning apparatus with manual dehumidifying function and method for operating the same

ABSTRACT

An air-conditioning apparatus with a manual dehumidifying function and a method for operating the same are disclosed. The air-conditioning apparatus is applied to an equipment room for air conditioning and dehumidifying the equipment room. The method of operating the air-conditioning apparatus includes the following steps: First, a temperature-sensing unit and a humidity-sensing unit are used to sense an ambient temperature and an ambient relative humidity in the equipment room, respectively. Afterward, a display unit is used to display the sensed ambient temperature and the sensed ambient relative humidity. Afterward, the air-conditioning apparatus is judged by a control unit to be manually controlled to execute the dehumidifying function. Afterward, the control unit of the air-conditioning apparatus is used to provide a variable air control and a variable water control for dehumidifying the equipment room. Finally, the air-conditioning apparatus is judged to complete dehumidifying or not by comparing a calculated dew point to a pre-determined threshold dew point.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to an air-conditioning apparatuswith a dehumidifying function and a method for operating the same, andmore particularly to an air-conditioning apparatus with a dehumidifyingfunction and a method for operating the same, which are applied to anequipment room for air conditioning and dehumidifying the equipmentroom.

2. Description of Prior Art

An equipment room is usually to be in an over-high humidity conditionbecause the door of the equipment room is unclosed when an airconditioner is initially installed or operated. Hence, server hosts orother equipment in the equipment room would be damaged due to corrodedcircuits under the over-high humidity environment. Under this condition,a good dehumidifying way needs to be used to solve the above-mentionedproblem.

At present, there are usually no particular dehumidifying designs to drythe humid equipment room, besides blocking the return air of the airconditioner through newspapers or cardboards. This way needs to spendmore time to dehumidify over-high humidity; however, the dehumidifyingeffect is usually not desirable, thus resulting in much energy consumes,poor effectiveness, and schedule delay.

Accordingly, it is desirable to provide an air-conditioning apparatuswith a manual dehumidifying function and a method for operating the sameto provide a good air regulation of the equipment room, thus ensuringthat the server hosts or other equipment can normally work.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems, an air-conditioningapparatus with a manual dehumidifying function is disclosed. Theair-conditioning apparatus is applied to an equipment room for airconditioning and dehumidifying the equipment room. The air-conditioningapparatus includes a control unit, a temperature-sensing unit, ahumidity-sensing unit, a display unit, an operation unit, a watercontrol unit, and an air control unit.

The temperature-sensing unit is electrically connected to the controlunit for sensing an ambient temperature. The humidity-sensing unit iselectrically connected to the control unit for sensing an ambientrelative humidity. The display unit is electrically connected to thecontrol unit for displaying the ambient temperature sensed through thetemperature-sensing unit and the ambient relative humidity sensedthrough the humidity-sensing unit. The operation unit is electricallyconnected to the control unit for operating the air-conditioningapparatus to execute a manual dehumidifying operation or a manualair-conditioning operation. The water control unit is electricallyconnected to the control unit for dehumidifying air flowed into theair-conditioning apparatus through a condensation operation. The aircontrol unit is electrically connected to the control unit for sendingthe dehumidified air out the air-conditioning apparatus.

In order to solve the above-mentioned problems, a method for operatingan air-conditioning apparatus with a manual dehumidifying function forair conditioning and dehumidifying an equipment room is disclosed. Themethod of operating the air-conditioning apparatus includes thefollowing steps: First, a temperature-sensing unit and ahumidity-sensing unit are provided to sense an ambient temperature andan ambient relative humidity, respectively. Afterward, a display unit isprovided to display the ambient temperature and the ambient relativehumidity. Afterward, a control unit is provided to judge a manualdehumidifying operation of the air-conditioning apparatus is executed.Afterward, the control unit is provided to execute a variable aircontrol and a variable water control of the air-conditioning apparatus.Finally, the dehumidifying operation of the air-conditioning apparatusis judged whether completed according to a dew point.

In order to solve the above-mentioned problems, a method for operatingan air-conditioning apparatus with a manual dehumidifying function forair conditioning and dehumidifying an equipment room is disclosed. Themethod of operating the air-conditioning apparatus includes thefollowing steps: First, a temperature-sensing unit and ahumidity-sensing unit are provided to sense an ambient temperature andan ambient relative humidity, respectively. Afterward, a display unit isprovided to display the ambient temperature and the ambient relativehumidity. Afterward, a control unit is provided to judge a manualdehumidifying operation of the air-conditioning apparatus is executed.Afterward, the control unit is provided to execute a variable aircontrol and a variable water control of the air-conditioning apparatus.Afterward, the dehumidifying operation of the air-conditioning apparatusis judged whether completed according to a dew point. Finally, thedehumidifying operation of the air-conditioning apparatus is judgedwhether completed according to a dehumidifying time when thedehumidifying operation of the air-conditioning apparatus is notcompleted.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary, and are intended toprovide further explanation of the invention as claimed. Otheradvantages and features of the invention will be apparent from thefollowing description, drawings and claims.

BRIEF DESCRIPTION OF DRAWING

The features of the invention believed to be novel are set forth withparticularity in the appended claims. The invention itself, however, maybe best understood by reference to the following detailed description ofthe invention, which describes an exemplary embodiment of the invention,taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic block diagram of an air-conditioning apparatuswith a manual dehumidifying function according to the present invention;

FIG. 2 is a perspective view of the air-conditioning apparatus accordingto the present invention;

FIG. 3 is a schematic block diagram of an operation unit and a displayunit of the air-conditioning apparatus according to the presentinvention;

FIG. 4 is a flowchart of a method for operating an air-conditioningapparatus according to a first embodiment of the present invention; and

FIG. 5 is a flowchart of the method for operating the air-conditioningapparatus according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now be made to the drawing figures to describe thepresent invention in detail.

Reference is made to FIG. 1 which is a schematic block diagram of anair-conditioning apparatus with a manual dehumidifying functionaccording to the present invention. The air-conditioning apparatus 10 isapplied to an equipment room for air conditioning and dehumidifying theequipment room. The air-conditioning apparatus 10 includes a controlunit 102, a temperature-sensing unit 104, a humidity-sensing unit 106, adisplay unit 108, an operation unit 110, a water control unit 112, andan air control unit 114.

The temperature-sensing unit 104 is electrically connected to thecontrol unit 102 for sensing an ambient temperature Ta. Thehumidity-sensing unit 106 is electrically connected to the control unit102 for sensing an ambient relative humidity Ha. The display unit 108 iselectrically connected to the control unit 102 for displaying theambient temperature Ta sensed through the temperature-sensing unit 104and the ambient relative humidity Ha sensed through the humidity-sensingunit 106. The operation unit 110 is electrically connected to thecontrol unit 102 for operating the air-conditioning apparatus 10 toexecute a manual dehumidifying operation or a manual air-conditioningoperation. The water control unit 112 is electrically connected to thecontrol unit 102 for dehumidifying air flowed into the air-conditioningapparatus 10 through a condensation operation. The air control unit 114is electrically connected to the control unit 102 for sending thedehumidified air out the air-conditioning apparatus 10.

In particular, the control unit 102 includes a calculation unit (notshown) and a comparison unit (not shown). The calculation unitcalculates a dew point of the air-conditioning apparatus 10 according tothe sensed ambient temperature Ta and the sensed ambient relativehumidity Ha. The comparison unit compares the calculated dew point to athreshold dew point to judge whether the dehumidifying operation of theair-conditioning apparatus 10 is completed or not. In addition, thecontrol unit 102 further includes a timing unit (not shown). The timingunit sets a dehumidifying time to judge whether the dehumidifyingoperation of the air-conditioning apparatus 10 is completed or not.

The detail operation of the air-conditioning apparatus 10 is describedas follows. Reference is made to FIG. 2 which is a perspective view ofthe air-conditioning apparatus according to the present invention. Whenthe air-conditioning apparatus 10 is applied to an equipment room forair conditioning and dehumidifying the equipment room, thetemperature-sensing unit 104 and the humidity-sensing unit 106 installedon the air-conditioning apparatus 10 are provided to sense thetemperature of the equipment room (namely, the ambient temperature Ta)and the relative humidity of the equipment room (namely, the ambientrelative humidity Ha). Also, the display unit 108 installed on theair-conditioning apparatus 10 is provided to display the ambienttemperature Ta and the ambient relative humidity Ha. In particular, thedisplay unit 108 can be a liquid crystal module (LCM).

The user can determine to manually operate the air-conditioningapparatus 10 to execute the dehumidifying operation or theair-conditioning operation to the equipment room according to thedisplayed temperature and relative humidity or his/her practicalexperiences. In addition, a buzzer (not shown) can be also installed inthe air-conditioning apparatus 10 to remind the user because of theover-high humidity to manually operate the air-conditioning apparatus 10to execute the dehumidifying operation to the equipment room.

The user can manually operate the operation unit 110 to control theair-conditioning apparatus 10 for dehumidifying the equipment room.Reference is made to FIG. 3 which is a schematic block diagram of anoperation unit and a display unit of the air-conditioning apparatusaccording to the present invention. The operation unit 110 can be aliquid crystal module (LCM) having at least one dehumidifying operationbutton (not labeled) and one air-conditioning operation button (notlabeled), further one power switch (not labeled). Accordingly, the usercan conveniently operate the air-conditioning apparatus 10 through theoperation unit 110. In addition, the display unit 108 can be used todisplay the sensed ambient temperature Ta and the sensed ambientrelative humidity Ha.

When the user presses the dehumidifying operation button fordehumidifying the equipment room, the water control unit 112 of theair-conditioning apparatus 10 dehumidifies the air flowed into theair-conditioning apparatus 10 by a condensation way of externallyinjecting low-temperature ice water into the water control unit 112. Inparticular, the water control unit 112 can be a three-way water pipeassemblage. The water quantity of the water control unit 112 can becontrolled using a variable water control by the control unit 102. Inthis embodiment, the variable water control is to provide a maximumwater control to the water control unit 112. That is, the maximum waterquantity of the water control unit 112 is provided for significantlycondensing the air flowed into the air-conditioning apparatus 10. Inaddition, when the user presses the dehumidifying operation fordehumidifying the equipment room, the air control unit 114 of theair-conditioning apparatus 10 can send the dehumidified air (namely, thedry air) out from the air-conditioning apparatus 10. In particular, theair control unit 114 can be a variable speed fan. The air quantity ofthe air control unit 114 can be controlled using a variable air controlby the control unit 102. In this embodiment, the variable air control isto provide a minimum air control to the air control unit 114. That is,the minimum air quantity and air speed of the air control unit 114 isprovided for weakly and slowly sending the dehumidified air (dry air)out from the air-conditioning apparatus 10, thus great significantlyavoiding the un-dehumidified air being sent out so as to prevent serverhosts or other equipment of the equipment room from being damagedbecause of the humid air.

Especially to deserve to be mentioned, the fan would generate a largetorque output when the fan is operated in a low speed. Hence, thevariable air control of the fan is typically set to 30%, thus increasingthe use life of the fan, even over 10 years. However, in order toprevent server hosts or other equipment of the equipment room from beingdamaged because of the humid air, the variable air control of the fan isusually set less than 30%, thus reducing the amount of theun-dehumidified air sent out from the air-conditioning apparatus 10. Inaddition, the water quantity of the three-way water pipe assemblage canbe controlled to achieve the maximum water control. That is, thevariable water control of the three-way water pipe assemblage istypically set to 100%, thus significantly condensing the air flowed intothe air-conditioning apparatus 10.

The air-conditioning apparatus 10 can judge whether the dehumidifyingoperation of the air-conditioning apparatus 10 is completed or notaccording to the dew point or the dehumidifying time when the userdetermine to manually operate air-conditioning apparatus 10 to executethe dehumidifying operation. Because the dew point can be calculatedaccording to the ambient temperature Ta and the ambient relativehumidity Ha (using the Magnus-Tetens Approximation), a threshold dewpoint is set to compare the calculated dew point to judge whether thedehumidifying operation of the air-conditioning apparatus 10 iscompleted or not. In addition, a dehumidifying time is set to judgewhether the dehumidifying operation of the air-conditioning apparatus iscompleted or not. Furthermore, the user can also determine to manuallyoperate the air-conditioning apparatus 10 to execute the dehumidifyingoperation, the air-conditioning operation, or the standby operationaccording to the displayed temperature and relative humidity or his/herpractical experiences.

Reference is made to FIG. 4 which is a flowchart of a method foroperating an air-conditioning apparatus according to a first embodimentof the present invention. The method for operating the air-conditioningapparatus with a manual dehumidifying function for air conditioning anddehumidifying an equipment room includes the following steps: First, theair-conditioning apparatus is powered on (S10). Afterward, atemperature-sensing unit and a humidity-sensing unit are used to sensean ambient temperature and an ambient relative humidity in the equipmentroom, respectively (S20). In particular, the temperature-sensing unitand the humidity-sensing unit are installed on the air-conditioningapparatus. Afterward, a display unit is used to display the sensedambient temperature and the sensed ambient relative humidity when astandby operation of the air-conditioning apparatus is executed (S30).In particular, the display unit can be a liquid crystal module (LCM)which is provided to simultaneously display the temperature and therelative humidity in the equipment room (as shown in FIG. 3). Afterward,the air-conditioning apparatus is manually operated by a user to executea dehumidifying operation (S40) or an air-conditioning operation (S80).That is, the user can manually operate the air-conditioning apparatus toexecute the dehumidifying operation to the equipment room according tothe ambient temperature and the ambient relative humidity displayed onthe display unit, or manually operate the air-conditioning apparatus toexecute the air-conditioning operation to the equipment room, or keepthe air-conditioning apparatus in the standby operation. In addition, abuzzer can be also installed in the air-conditioning apparatus to remindthe user to manually operate the air-conditioning apparatus to executethe dehumidifying operation to the equipment room.

The air-conditioning apparatus is controlled to execute thedehumidifying control through a control unit (S50) when the usermanually operates the air-conditioning apparatus to execute thedehumidifying operation (S40). Also, the dehumidifying control includesa variable air control (S502) and a variable water control (S504). Inparticular, the variable air control is a minimum air control and thevariable water control is a maximum water control. In order to providethe optimal dehumidifying ability of the air-conditioning apparatus, theair-conditioning apparatus provides a maximum water control to a watercontrol unit (as shown in FIG. 1). That is, the maximum water quantityof the water control unit is provided for significantly condensing theair flowed into the air-conditioning apparatus. In addition, theair-conditioning apparatus provides a minimum air control to an aircontrol unit (as shown in FIG. 1). That is, the minimum air quantity andair speed of the air control unit is provided for weakly and slowlysending the dehumidified air (dry air) out from the air-conditioningapparatus, thus significantly avoiding the un-dehumidified air beingsent out so as to prevent the equipment of the equipment room from beingdamaged because of the humid air. In a practical application, the usercan also manually operate the air-conditioning apparatus to execute theair-conditioning operation (S80). That is, the user can ignore manuallyoperating the air-conditioning apparatus to execute the dehumidifyingoperation to directly manually operate the air-conditioning apparatus toexecute the air-conditioning operation if the equipment room needs notto be dehumidified.

Afterward, a dew point is calculated to judge whether the dehumidifyingoperation of the air-conditioning apparatus is completed or not (S60).In this step, because the dew point can be calculated according to anambient temperature and an ambient relative humidity, a threshold dewpoint can be set to compare the calculated dew point to judge whetherthe dehumidifying operation of the air-conditioning apparatus iscompleted or not. For example, the threshold dew point is set to 5° C.Because the air-conditioning apparatus continuously works, thecalculated dew point of the equipment room gradually decreases. Thedehumidifying operation of the air-conditioning apparatus is completedwhen the calculated dew point is less than the threshold dew point. Onthe other hand, the air-conditioning apparatus continuously works toexecute the dehumidifying operation when the calculated dew point isgreater than or equal to the threshold dew point.

Especially to deserve to be mentioned, the dew point of the equipmentroom can be calculated by using the Magnus-Tetens Approximationaccording to the following formula:

$T_{d} = \frac{b \times {\gamma \left( {T,{RH}} \right)}}{a - {\gamma \left( {T,{RH}} \right)}}$${Wherein},{{\gamma \left( {T,{RH}} \right)} = {\frac{a \times T}{b + T} + {\ln \left( {{RH}/100} \right)}}}$

Wherein, these terms Td, T, RH, ln represent a calculated dew point, anambient temperature, an ambient relative humidity, and a natural logoperation, respectively. Also, the two terms a and b are both constants,and are 17.27 and 237.7° C., respectively.

In addition, the approximation formula is suitable for use under thefollowing conditions: 0° C.<T<60° C., 1%<RH<100%, and 0° C.<Td<50° C.

The step (S30) (namely, the standby operation of the air-conditioningapparatus) is re-executed when the dehumidifying operation of theair-conditioning apparatus is completed. As mentioned above, thedehumidifying operation of the air-conditioning apparatus is completedwhen the calculated dew point of the equipment room is less than thethreshold dew point. At this time, the air-conditioning apparatus isstandby. Hence, the user can determine to manually operateair-conditioning apparatus to execute the air-conditioning operation ordehumidifying operation once again by re-setting the different thresholddew points. The step (S50) is re-executed when the dehumidifyingoperation of the air-conditioning apparatus is not completed. That is,the dehumidifying operation of the air-conditioning apparatus iscontinuously executed when the calculated dew point is still greaterthan or equal to the threshold dew point.

Reference is made to FIG. 5 which is a flowchart of the method foroperating the air-conditioning apparatus according to a secondembodiment of the present invention. The major difference between thesecond embodiment and the first embodiment is that a dehumidifying timeis added to judge whether the dehumidifying operation of theair-conditioning apparatus is completed or not. The difference betweenthe two embodiments will be described in detail as follows, whereas thesame that is briefly described. The method for operating theair-conditioning apparatus with a manual dehumidifying function for airconditioning and dehumidifying an equipment room includes the followingsteps: First, the air-conditioning apparatus is powered on (S10).Afterward, a temperature-sensing unit and a humidity-sensing unit areused to sense an ambient temperature and an ambient relative humidity inthe equipment room, respectively (S20). Afterward, a display unit isused to display the sensed ambient temperature and the sensed ambientrelative humidity when a standby operation of the air-conditioningapparatus is executed (S30). Afterward, the air-conditioning apparatusis manually operated by a user to execute a dehumidifying operation(S40) or an air-conditioning operation (S80).

The air-conditioning apparatus is controlled to execute thedehumidifying control through a control unit (S50) when the usermanually operates the air-conditioning apparatus to execute thedehumidifying operation (S40). Also, the dehumidifying control includesa variable air control (S502) and a variable water control (S504).Afterward, a dew point is calculated to judge whether the dehumidifyingoperation of the air-conditioning apparatus is completed or not (S60).The step (S30) (namely, the standby operation of the air-conditioningapparatus) is re-executed when the dehumidifying operation of theair-conditioning apparatus is completed. On the other hand, adehumidifying time is judged whether the dehumidifying operation of theair-conditioning apparatus is completed or not when the dehumidifyingoperation of the air-conditioning apparatus is not completed (S70). Inthe step (S70), the user can use a timing unit to set the dehumidifyingtime of the air-conditioning apparatus. For example, the dehumidifyingtime is set to 12 hours. The dehumidifying operation of theair-conditioning apparatus is completed when the air-conditioningapparatus continuously works to execute the dehumidifying operation over12 hours. On the other hand, the air-conditioning apparatus continuouslyworks to execute the dehumidifying operation when the dehumidifying timeof the air-conditioning apparatus is less than 12 hours. The step (S30)(namely, the standby operation of the air-conditioning apparatus) isre-executed when the dehumidifying operation of the air-conditioningapparatus is completed. On the other hand, the step (S50) (namely, thedehumidifying operation of the air-conditioning apparatus) isre-executed when the dehumidifying operation of the air-conditioningapparatus is not completed. Furthermore, the user can also determine tomanually operate the air-conditioning apparatus to execute thedehumidifying operation, the air-conditioning operation, or the standbyoperation according to the displayed temperature and relative humidityor his/her practical experiences. Accordingly, the dehumidifyingoperation of the air-conditioning apparatus can be flexibly executedaccording to the dew point control and the dehumidifying time control.

In conclusion, the present invention has following advantages:

1. The user can manually operate the air-conditioning apparatus toexecute the dehumidifying operation to provide a good air regulation ofthe equipment room, thus ensuring that the server hosts or otherequipment can normally work;

2. The operation unit is provided to the user for conveniently operatingthe air-conditioning apparatus to execute a manual dehumidifyingoperation or a manual air-conditioning operation; and

3. The dehumidifying operation of the air-conditioning apparatus can beflexibly executed according to the dew point control and thedehumidifying time control.

Although the present invention has been described with reference to thepreferred embodiment thereof, it will be understood that the inventionis not limited to the details thereof. Various substitutions andmodifications have been suggested in the foregoing description, andothers will occur to those of ordinary skill in the art. Therefore, allsuch substitutions and modifications are intended to be embraced withinthe scope of the invention as defined in the appended claims.

1. An air-conditioning apparatus with a manual dehumidifying functionapplied to an equipment room for air conditioning and dehumidifying theequipment room; the air-conditioning apparatus comprising: a controlunit; a temperature-sensing unit electrically connected to the controlunit for sensing an ambient temperature; a humidity-sensing unitelectrically connected to the control unit for sensing an ambientrelative humidity; a display unit electrically connected to the controlunit for displaying the ambient temperature sensed through thetemperature-sensing unit and the ambient relative humidity sensedthrough the humidity-sensing unit; an operation unit electricallyconnected to the control unit for operating the air-conditioningapparatus to execute a manual dehumidifying operation or a manualair-conditioning operation; a water control unit electrically connectedto the control unit for dehumidifying air flowed into theair-conditioning apparatus through a condensation operation; and an aircontrol unit electrically connected to the control unit for sending thedehumidified air out the air-conditioning apparatus.
 2. Theair-conditioning apparatus of claim 1, wherein the control unitcomprising: a calculation unit calculating a dew point of theair-conditioning apparatus according to the sensed ambient temperatureand the sensed ambient relative humidity; and a comparison unitcomparing the calculated dew point to a threshold dew point to judgewhether the dehumidifying operation of the air-conditioning apparatus iscompleted or not.
 3. The air-conditioning apparatus of claim 1, whereinthe control unit further comprising a timing unit setting adehumidifying time to judge whether the dehumidifying operation of theair-conditioning apparatus is completed or not.
 4. The air-conditioningapparatus of claim 1, wherein the operation unit is manually operated bya user.
 5. The air-conditioning apparatus of claim 1, wherein theoperation unit is a liquid crystal module (LCM).
 6. The air-conditioningapparatus of claim 1, wherein the water control unit is a water-cooledcondenser.
 7. The air-conditioning apparatus of claim 1, wherein the aircontrol unit is a variable speed fan.
 8. A method for operating anair-conditioning apparatus with a manual dehumidifying function for airconditioning and dehumidifying an equipment room; steps of operating theair-conditioning apparatus comprising: (a) sensing an ambienttemperature and an ambient relative humidity through atemperature-sensing unit and a humidity-sensing unit, respectively; (b)displaying the ambient temperature and the ambient relative humiditythrough a display unit; (c) judging a manual dehumidifying operation ofthe air-conditioning apparatus being executed through a control unit;(d) executing a variable air control and a variable water control of theair-conditioning apparatus through the control unit; and (e) judgingwhether the dehumidifying operation of the air-conditioning apparatus iscompleted or not according to a dew point.
 9. The method for operatingthe air-conditioning apparatus of claim 8, after the step (b) furthercomprising: (c2) judging a manual air-conditioning operation of theair-conditioning apparatus being executed through the control unit. 10.The method for operating the air-conditioning apparatus of claim 8, inthe step (e), the step (b) is re-executed when the dehumidifyingoperation of the air-conditioning apparatus is completed.
 11. The methodfor operating the air-conditioning apparatus of claim 8, in the step(e), the step (d) is re-executed when the dehumidifying operation of theair-conditioning apparatus is not completed.
 12. The method foroperating the air-conditioning apparatus of claim 8, in the step (d),the variable air control is a minimum air control.
 13. The method foroperating the air-conditioning apparatus of claim 8, in the step (d),the variable water control is a maximum water control.
 14. A method foroperating an air-conditioning apparatus with a manual dehumidifyingfunction for air conditioning and dehumidifying an equipment room; stepsof operating the air-conditioning apparatus comprising: (a) sensing anambient temperature and an ambient relative humidity through atemperature-sensing unit and a humidity-sensing unit, respectively; (b)displaying the ambient temperature and the ambient relative humiditythrough a display unit; (c) judging a manual dehumidifying operation ofthe air-conditioning apparatus being executed through a control unit;(d) executing a variable air control and a variable water control of theair-conditioning apparatus through the control unit; (e) judging whetherthe dehumidifying operation of the air-conditioning apparatus iscompleted or not according to a dew point; and (f) judging whether thedehumidifying operation of the air-conditioning apparatus is completedor not according to a dehumidifying time when the dehumidifyingoperation of the air-conditioning apparatus is not completed.
 15. Themethod for operating the air-conditioning apparatus of claim 14, afterthe step (b) further comprising: (c2) judging a manual air-conditioningoperation of the air-conditioning apparatus being executed through thecontrol unit.
 16. The method for operating the air-conditioningapparatus of claim 14, in the step (e), the step (b) is re-executed whenthe dehumidifying operation of the air-conditioning apparatus iscompleted.
 17. The method for operating the air-conditioning apparatusof claim 14, in the step (f), the step (b) is re-executed when thedehumidifying operation of the air-conditioning apparatus is completed.18. The method for operating the air-conditioning apparatus of claim 14,in the step (f), the step (d) is re-executed when the dehumidifyingoperation of the air-conditioning apparatus is not completed.
 19. Themethod for operating the air-conditioning apparatus of claim 14, in thestep (d), the variable air control is a minimum air control.
 20. Themethod for operating the air-conditioning apparatus of claim 14, in thestep (d), the variable water control is a maximum water control.